Invented by Candice Hellen Brown Elliott, Michael Francis Higgins, Samsung Display Co Ltd

The market for subpixel rendering filters for high brightness subpixel designs is experiencing significant growth due to the increasing demand for high-quality displays in various industries. Subpixel rendering refers to a technique that enhances the resolution and image quality of displays by utilizing the individual subpixels of each pixel. In recent years, there has been a surge in the adoption of subpixel rendering filters, especially in applications such as smartphones, televisions, and virtual reality devices. These filters are designed to optimize the performance of high brightness subpixel displays, ensuring that the images produced are sharp, vibrant, and visually appealing. One of the key drivers behind the growing market for subpixel rendering filters is the rising consumer expectations for superior display quality. As technology advances, consumers are becoming more discerning when it comes to the visual experience provided by their devices. They demand displays that offer high resolution, accurate color reproduction, and excellent contrast ratios. Subpixel rendering filters play a crucial role in meeting these expectations by improving the overall image quality and enhancing the viewing experience. Another factor contributing to the market growth is the increasing adoption of high brightness subpixel designs in various industries. High brightness displays are essential in outdoor environments, where sunlight and ambient lighting can significantly impact visibility. Subpixel rendering filters help to mitigate these challenges by optimizing the display’s performance, ensuring that the content remains clear and legible even in bright conditions. Furthermore, the market for subpixel rendering filters is also driven by the growing popularity of virtual reality (VR) and augmented reality (AR) technologies. These immersive experiences heavily rely on high-quality displays to provide users with a realistic and engaging environment. Subpixel rendering filters enable the creation of sharper and more detailed virtual worlds, enhancing the overall immersion and user satisfaction. The market for subpixel rendering filters is highly competitive, with several key players vying for market share. Companies are investing in research and development to develop innovative filter technologies that can deliver superior image quality and performance. Additionally, manufacturers are focusing on improving the efficiency and durability of these filters to meet the demands of various industries. In conclusion, the market for subpixel rendering filters for high brightness subpixel designs is witnessing significant growth due to the increasing demand for high-quality displays in various industries. As consumers and industries continue to prioritize visual excellence, subpixel rendering filters play a crucial role in enhancing the resolution, color accuracy, and overall image quality of displays. With the rapid advancement of technology and the rising popularity of VR and AR, the market for these filters is expected to continue its upward trajectory in the coming years.

The Samsung Display Co Ltd invention works as follows

A display system includes a display panel that is substantially comprised of a subpixel group repeated across the panel with a regular pattern. The subpixel group includes at least one white and a number of colored subpixels. Display system also includes input circuitry that receives input image data for an image to be rendered on the display panel and subpixel rendering circuitry to calculate an output luminance for each subpixel. Subpixel rendering circuitry multiplies the data values for a spatial part of input image data with at least one kernel image which has a matrix of coefficients that are arranged so that each coefficient represents fractional parts of data values. The subpixel rendering is configured to sharpen output luminance values by using a luminance signals.

Background for Subpixel rendering filter for high brightness subpixel designs

In common owned United States Patent applications: No. No. Filed July. Now issued as U.S. Pat. No. 6,903,754 (?the ‘754 patent? ); (2) U.S. patent application Ser. No. No. 10/278,353, entitled ‘IMPROVEMENTS IN COLOR FLAT PANEL DISPLAY ARRANGEMENTS, LAYOUTS, AND SUB-PIXEL RENDERING FOR SUBPIXEL RENDERING, WITH INCREASED TRANSFER FUNCTION REACTION,? Filed Oct. 22,2002, and published under US Patent Publication No. 2003/0128225 (?the ‘225 application? ); (3) U.S. patent application Ser. No. No. 10/278 352, entitled ‘IMPROVEMENTS IN COLOR FLAT PANEL DISPLAY SUBPIXEL ARRANGEMENTS, AND LAYOUTS OF SUBPIXEL RENDERING FOR SPLIT BLUE PIXELS? Filed Oct. 22,2002 and published under US Patent Publication No. 2003/0128179 (?the ‘179 application? ); (4) U.S. patent application Ser. No. No. 10/243.094, entitled ‘IMPROVED COLOR DISTRIBUTIONS AND EMITTERS TO SUB-PIXEL RENDERING? Filed Sep. 13,2002 and published as US Patent Publication No. 2004/0051724 (?the ‘724 application? ); (5) U.S. patent application Ser. No. No. 10/278 328, entitled ‘IMPROVEMENTS IN COLOR FLAT PANEL DISPLAY SUBPIXEL ARRANGEMENTS, LAYOUTS, AND LAYOUTS FOR REDUCED BLUE LUMINANCE WITH WELL VISIBILITY? Filed Oct. 22,2002 and published under US Patent Publication No. 2003/0117423 (?the ‘423 application? ); (6) U.S. patent application Ser. No. No. Published as US Patent Publication No. 2003/0090581 (?the ‘581 application? ); (7) U.S. patent application Ser. No. No. 10/347,001 entitled ‘IMPROVED STRIPED DISPLAY ARRANGEMENTS AND METHODS, SYSTEMS, AND METHODS FOR SUB PIXEL RENDERING THE SAME? Published as US Patent Publication No. 2004/0080479 (?the ‘479 application? Each of which is incorporated herein by reference in its entire, novel sub-pixel arrangement are disclosed for improving cost/performance curves on image display devices.

For certain subpixel groups with an even number subpixels in the horizontal direction, following systems and techniques can be used to improve, e.g. Proper dot inversion schemes, and other improvements are disclosed. They are incorporated herein by reference. No. No. 10/456 839, entitled “IMAGE DEGRADATION CORRECTION IN NOVEL CRYSTAL DELIVERIES” Published as US Patent Publication No. 2004/0246280 (?the ‘280 application? ); (2) U.S. patent application Ser. No. No. 10/455925, entitled “DISPLAY PANEL WITH CROSSOVER CONNECTIONS AFFECTING DOT INVERSION?” Published as US Patent Publication No. 2004/0246213 (?the ‘213 application? ); (3) U.S. patent application Ser. No. No. 10/455.931, entitled “SYSTEM AND METHOD FOR PERFORMING DOT INVERSION WITH STANDARD DRIVERS AND BACKPLANE OVER NOVEL DISPLAY PANELS LAYOUTS” Now issued as U.S. Pat. No. 7,218,301 (?the ‘301 patent? ); (4) U.S. patent application Ser. No. No. 10/455 927, entitled?SYSTEM FOR COMPENSATING VISUAL EFFECTS ON PANELS WITH FIXED PATTERN LOUDNESS WITH REDUCED QUANTIZATION ERRROR? Now issued as U.S. Pat. No. 7,209,105 (?the ‘105 patent? ); (5) U.S. patent application Ser. No. No. 10/456 806, entitled “DOT INVERSION OF NOVEL DISPLAY PANELS WITH EXTRA DRIVERS” Now issued as U.S. Pat. No. 7,187,353 (?the ‘353 patent? ); (6) U.S. patent application Ser. No. No. 10/456 838, entitled “LIQUID CRYSTAL DISPLAY BACKWARD PLANS AND ADDRESSING OF NON-STANDARD SUBPIXEL ARRANGEMENTS” Published as US Patent Publication No. 2004/0246404 (?the ‘404 application? ); (7) U.S. patent application Ser. No. No. 2005/0083277 (?the ‘277 application? 2005/0083277 (?the ‘277 application? No. No. 10/807 604 entitled “IMPROVED TRANSISTOR BACKSPLANS FOR LIQUID CRYSTAL DISPLAYS INCLUDING DIFFERENT SIZE SUBPIXELS”, filed Mar. 23rd, 2004. Published as US Patent Publication No. 2005/0212741 (?the ‘741 application?);.

These improvements are especially pronounced when combined with the sub-pixel rendering systems and methods disclosed further in these applications and in United States patents applications owned by other parties: (1) U.S. No. No. 10/051,612, titled?CONVERSION TO ANOTHER SUBPIXEL DATA FORMAT OF A SUBPIXEL DATA? Filed Jan. 16,2002 now issued as U.S. Pat. No. 7,123,277 (?the ‘277 patent? ); (2) U.S. patent application Ser. No. No. 10/150 355, entitled ‘METHODS AND SYSTEMS OF SUB-PIXEL RENDERING W/GAMMA ADJUSTMENT? Filed May 17, 2002, now issued as U.S. Pat. No. 7,221,381 (?the ‘381 patent? ); (3) U.S. patent application Ser. No. No. 10/215,843, entitled ‘METHODS AND SYSTEMS OF SUB-PIXEL RENDERING W/ADAPTIVE FILTERS,? Filed Aug. 8,2002 now issued as U.S. Pat. No. 7,184,066 (?the ‘066 patent? ); (4) U.S. patent application Ser. No. No. Filed on Mar. Published as US Patent Publication No. 2004/0196302 (?the ‘302 application? 2004/0196302 (?the ‘302 application? ); (5) U.S. patent application Ser. No. No. 10/379.765, entitled “SYSTEMS AND MECHANISMS FOR MOTION ADAPTIVA FILTERING”, filed Mar. Filed Mar. Now issued as U.S. Pat. No. 7,167,186 (?the ‘186 patent? ); (6) U.S. patent application Ser. No. No. 10/379 766 entitled ‘SUB-PIXEL RENDERING SYSTEM and METHOD FOR IMPROVED DISPLAY VIEWING ANGLES’ Filed Mar. Now issued as U.S. Pat. No. 6,917,368 (?the ‘368 patent? ); (7) U.S. patent application Ser. No. No. Filed Apr. US Patent Publication No. 2004/0196297 (?the ‘297 application? 2004/0196297 (?the ‘297 application? 2004/0196297 (?the ‘297 application?

Patent application No. No. No. No. 6,980,219 (?the ‘219 patent? ); (2) U.S. patent application Ser. No. No. 2005/0083341 (?the ‘341 application? ); (3) U.S. patent application Ser. No. No. 2005/0083352 (?the ‘352 application?) The ‘352 application? No. No. 10/690 716 entitled “GAMUT CONVERSION SYTEM AND METHOD” Filed Oct. 21, 2003, now issued as U.S. Pat. No. 7,176,935 (?the ‘935 patent? “7,176,935 (?the ‘935 patent?

Patent application No. No. No. No. 7,084,923 (?the ‘923 patent? Patent No. 7,084,923 (the ‘923 patent? No. No. 10/696.026 entitled ‘SYSTEM AND METHOD OF PERFORMING IMAGE RESCONSTRUCTION TO EFFECT SCALING IN MULTI MODE DISPLAY’? Filed Oct. 28, 2003, and published under US Patent Publication No. 2005/0088385 (?the ‘385 application?).

Additionally these co-owned or co-pending applications have been incorporated herein by reference to their entire content: (1) U.S. Patent application Ser. No. No. 10/821 387 entitled ‘SYSTEM AND METHOD TO IMPROVING THE SUB-PIXEL RENDERING IMAGE DATA ON NON-STRIPED DISPLAY SYSTEMS’ Published as US Patent Publication No. 2005/0225548 (?the ‘548 application? ); (2) U.S. patent application Ser. No. No. 10/821 386 entitled “SYSTEMS AND MEANS FOR SELECTING WHITE POINTS FOR IMAGE DELIVERIES” Published as US Patent Publication No. 2005/0225561 (?the ‘561 application? ); (3) U.S. patent application Ser. No. No. 10/821 353, entitled “NOVEL SUBPIXEL ARRANGEMENTS AND LAYOUTS FOR HIGH BRIGHTNESS DIAGRAMS?” Published as US Patent Publication No. 2005/0225574 (?the ‘574 application? ); (4) U.S. patent application Ser. No. No. Published as US Patent Publication No. 2005/0225562 (?the ‘562 application? All of these are hereby incorporated as references. “All patent applications mentioned within this specification will be incorporated in full by reference.

Now, we will refer in detail to the implementations and embodiments that are shown in the accompanying drawings.” The same reference numbers are used to refer to similar or identical parts wherever possible.

Subpixel Rendering in Five Color Systems with White

FIG. “FIG. 1 illustrates one embodiment of the portion of a multiprimary, high-brightness display 100 that consists of a subpixel group 102. The group 102 is a octal repeating subpixel group that includes white (or subpixels without color filters) subpixels, red subpixels, green subpixels, blue subpixels, and cyan-colored subpixels. This white subpixel helps to achieve high brightness on the display. The white subpixels, which are the majority, also provide high performance in MTF Limit. This embodiment has equal numbers of subpixels for red, green, blue, and cyan. Other embodiments, however, may vary from this color partitioning. It may be beneficial to make the color points for the minor subpixels deeply saturated, given that the white subpixel adds brightness to the system while the cyan color gives a wider gamut. Note that the color points and energies of these subpixels are only “substantially”? The colors are described as “red”, “green”, “blue”, ‘cyan’, and white. It is possible to adjust the exact color points in order to achieve a white point that you desire when all subpixels are brightest.

FIG. The second embodiment is a 5-color, high-brightness display. The subpixel grouping is group 202, which is larger than that shown in FIG. The color subpixels have been placed on a hexagonal matrix. A hexagonal grid has the potential to spread Fourier energies out in more directions. This is especially helpful for dark luminance wells that are caused by blue subpixels. A possible benefit is that each column contains all four colors, as well as white subpixels. This allows for horizontal lines to remain black and white with full sharpening, without chromatic distortion.

One possible embodiment” of a display using this layout could process image data, and render it in the following way:

The subpixel filter kernels can be constructed using area resampling, as revealed earlier in numerous incorporated applications. Subpixel rendering can be done for both layouts using data sets with a mapping of one-to-1. One incoming conventional pixel is mapped to one subpixel of white. The white subpixels can then reconstruct the majority of the luminance signal. The color subpixels around the image are then used to generate the color signal. Color gamut mapping, with or without expansion of the gamut, can be used to convert any color format into RGBCW, which is expected by the engine. You will see that these area resampling filter can be replaced with other subpixel rendering methods: resampling by bicubic filters, sinc filters or windowed-sinc filters and any convolutions of them. The scope of this invention includes the use of other techniques.

As white subpixels can be mapped to one another, a unity filter is not required. The color planes can be filtered with a variety of kernels. Assuming that the image has a band limit, for example, one embodiment could shift the phase of both the color planes as well as the Luminance to the horizontal interstitial position of the subpixels. You can achieve this with a simple cube interpolation: 1/16, 9/16, 9/16, ? 1/16. Note that it may not be necessary to shift the white plane. Images that are not band-limited (e.g. There may not be a need for the cubic phase shift.

Then, color planes can be filtered using an area resample. You can add a Difference of Gaussian filter (DOG), which is applied to luminance. Examples are shown here.

1\n2\n1\n2\n4\n2\n1\n2\n1\n(\nDivide\n?\n?\nby\n?\n?\n16\n)

Area Resample filter for hexagonal and Square arrangement

0\n0\n-\n2\n0\n0\n-\n1\n0\n0\n0\n-\n1\n0\n0\n8\n0\n0\n-\n1\n0\n0\n0\n-\n1\n0\n0\n-\n2\n0\n0\n(\nDivide\n?\n?\nby\n?\n?\n16\n)

DOG Filter” for hexagonal arrangement in FIG. 2.

It is important to note that the non-zero value coincides with the same colour in order to maintain the balance of the colors. The luminance signal simplifies the ‘cross-color’ technique. sharpening.

In another embodiment, you could perform cross-color sharpening by distributing the coefficients of cross-color among the color filters kernels so that the matrices sum up to the desired number, as shown above. A useful method is to divide each of the subpixel luminance values (red, green blue and cyan) by the luminance of the color being sharpened. Then multiply this result by the matrix and add a normalization constant to make it equal to the matrix. A second way would be to ignore the normalization. This would result in some colors experiencing a sharpening greater than unity. The colors with the lowest luminosity would have the most gain. This property can be used to reduce ‘dottiness’ This property may be useful to reduce the?dottiness? The luminance signal can also drive these methods and techniques.

In one embodiment, the gains of the system can be adjusted by multiplying the values in the sharpening matrix with a constant. In this embodiment, if a constant is lower than 1, the filter will be softer. If the constant exceeds one, it will be sharper. The present invention contemplates other embodiments with different matrices, constants, and so on.

Click here to view the patent on Google Patents.